150 Mbps isolation without the timing headache
The Texas Instruments ISO7240MDW is a 4-channel, unidirectional digital isolator using capacitive coupling to pass signals across a 2500 Vrms isolation barrier. It is built for general-purpose galvanic isolation in industrial communication links, motor drives, and grid-tied equipment where common-mode transients are severe. The part handles 150 Mbps data rates with a maximum propagation delay of 23 ns and pulse-width distortion held to 2 ns, so it fits into high-speed SPI, UART, or CAN buses without eating into the timing budget.
Supply flexibility and transient immunity
Common-mode transient immunity is rated at 25 kV/µs minimum, which means the outputs stay clean when a motor drive or inverter throws kilovolt edges across the barrier. Rise and fall times are a typical 2 ns, keeping signal integrity tight on short PCB traces.
Surface-mount only; no isolated power on-chip — the secondary side needs its own supply rail.